Complete
Valve-bag filling systems
Rotary Impeller Packer
Pneumatic Roto-Packer
In-line Packing Machine
Valve Bag Applicator
Automatic bag filling systems
As one of the world’s leading suppliers of bag filling and packaging plant,
Möllers produces valve bag filling machines with the most advanced
engineering using almost all filling systems, configured as rotating packers,
in-line packers and single packers, depending on the type of system. The
Möllers range of bag filling machines is available with a wide variety of
performance ratings, providing an efficient packaging solution for all materials.
Electronic weighing systems are an integral component of Möllers packers,
providing a high level of filling weight accuracy at high filling throughput rates,
generally better than the calibration accuracy.
Advantages
of horizontal filling impellers
The rotating impeller packer is the most advanced
form of high-performance filling machine. It is
used for filling cement, lime, gypsum and other
particulate products into valve bags and is mainly
used where large quantities of product have to be
filled in a cost-effective manner.
The distinguishing feature of the Möllers impeller
packer is the horizontally mounted filling
impeller which is much more energy-efficient than
a vertical impeller, with the added advantage of
greatly reduced wear. The horizontal impeller can
even fill abrasive products efficiently, with its
proven universal capability over a wide range of
grain sizes from 4 mm to a Blaine fineness of
20,000. The vertical configuration of the filling
impeller motor with the directly mounted impeller
gives the Möllers impeller packer the additional
advantage of a compact, space-saving format.
Service-friendly module design
The advanced modular construction of the Möllers impeller
Roto-Packer is combined with exceptional ease of servicing.
All components are readily accessible. The quick-swap
construction of the impeller filling module makes replacing the
impeller wheel a matter of minutes. The machines are also easy
and quick to adjust to different filling weights, bag dimensions
and product characteristics – all part of the high-performance
design. The optimized flow path to the impellers, with specially
designed silo cones, incorporated aeration cushions and the
large inlet cross-section of the impellers, are an integral part
of the design features of the Möllers packer. The impellers also
have a second outlet for rapid emptying of the packer silo by
remote control, which is particularly important in the case of
frequent changes of product. With its highly developed
dedusting system and optimized spillage return flow, the filling
machines are designed for low-contamination packaging.
– 2–
Modular
Impeller Roto-Packer
Filling modules form the basic components
The basic module of the Möllers impeller packer is the filling
module. It combines the filling impeller with the filling spout,
the bag holder and the weighing electronics as a complete
bag-filling unit. The filling modules are mounted on a packer
silo from which the material flows. The filling rate of a module
is about 350 bags per hour for medium fineness cement. With
a suitable number of filling modules on a packer silo, filling
rates of 1,000 to 5,500 bags per hour are achieved. To make
economic use of the high work rate of Möllers Roto-Packers,
the empty bags must be fed by an automatic valve bag placing
machine to ensure a uniformly high bag placing frequency with
a correspondingly consistent filling system output level.
Example: 8 spouts
Example 12 Spouts
Impeller Roto-Packer output
with 50 and 25/35 kg bags,
product CEM I 42.5 N
25 and 35 kg bags: 1 000 to 5 500 bags per hour
50 kg bags: 900 to 5 000 bags per hour
Example: 16 Spouts
The filling module - basic
component of Möllers
impeller packers
Packers of various sizes can easily be
composed by means of the Möllers
module system
5 000
4 500
4 000
3 500
3 000
Filling rates just as required, also upgradeable
Möllers impeller Roto-Packers are fitted with three to 16 filling
spouts. The ingenious modular construction has resulted in an
efficient, compact machine design that can be adapted
precisely to the performance requirements of the operator. It is
also possible to buy just a packer with a partially equipped
packer silo, and expand it later to double the number of spouts
as required for increased production output.
2 500
2 000
1 500
1 000
500
0
3
4
5 6
7 8
Number of spouts
– 3–
9 10 11 12 13 14 15 16
Möllers Rotronic® packer control
Closed loop filling
A high filling rate combined with
consistent filling weight metering – this is
principally the function of the electronic
weighing system independently fitted to
each filling module of a Möllers impeller
packer. The electronic filling system
controls the entire filling sequence,
performing several functions directly
affecting the precision of the filling
process. The electronics constantly
measures the flow characteristics of the
product by the millisecond, matching the
fine/coarse filling switch-over point to
adjust the filling weight to the nominal
value as closely and as quickly as possible.
Control from the central terminal
Bag
application
Taring
Coarse flow
- Vibration
cut-out
- Setpoint/
actual value
comparison
- Broken bag
check
- Coarse/fine
flow changeover point
On-line
control
- Self
optimization
- Optimizazion of
the coarse/fine
flow changeover point
- Run-on
correction
Fine flow
- Vibration
cut-out
- Setpoint/
actual value
comparison
- Run-on
On-line
control
- Selfoptimization
- Run-on
correction
Tolerance
- Weight check
and standard
deviation: average value from
ten weighings
- Secondary
metering
Bag discharge
– 4–
Printer
The messages of all the filling modules feed
in to the monitoring function in the central
terminal of the Möllers Rotronic® packer
control unit. All the modules can be
individually set from here, or jointly set to
desired values, weighing parameters and
types of product. All filling weights are
continuously displayed on the central
monitor. Default settings such as the
switchover point can be first transferred to
one module, adjusted as necessary, then
copied to the other filling spouts at the
press of a button when the start-up check
has been successfully completed. Filling
parameters for up to 99 types of product
can be stored in the Möllers Rotronic
control unit.
Efficient
filling weight mean adjustment
The sophisticated weighing electronics of the Möllers
Rotronic® control unit fills the valve bags with a precision
significantly above the calibration accuracy. However,
separation loss is one of the unavoidable characteristics of the
valve bag and its filling technology. It refers to the amount of
product spilt from the valve when the bag is separated from the
filling spout. It varies from bag to bag, it is compensated in the
filling process by a set degree of product overfill.
When variations outside the normal distribution
The checkweigher
eliminates off-weight
bags, performs the
mean value adjustment,
and collects statistical
data
The weight is monitored by the checkweigher, which has the
function of correcting the filling weight setting of the weighing
electronics, as well as rejecting off-weight bags, in order to
counteract the variations in filling weight. In combination with
the Rotronic® packer control unit, Möllers has refined the
filling weight adjustment for individual bags for mean value
adjustment. This significant improvement determines the mean
variation over a particular number of weighings, and only
makes adjustments to the settings when the variations fall
outside the normal distribution. This way the mean adjustment
takes account of the fluctuations in separation loss, and at the
same time avoids constantly adjusting the filling weight value.
The bag discharge
station removes the
off-weight bags,
controlled by the
checkweigher
1 Vertical double rotary feeder
2 Rotary impeller packer with bag
applicator
3 Spillage collection system
4 Bag discharge belt
5 Bag cleaning station
6 Bag checkweigher
7 Bag removal device
8 Bag ripping machine with drum
screen
9 Spillage return screw
– 5–
Pneumatic rotary and in-line packers
The Möllers rotary packer with air filling system can be used for
many bulk materials with poor flow properties and mixtures of
coarse and fine particles or of particularly heavy and light
components. Each filling module consists of a pressurized
filling chamber with a cone-type closure valve, a level
indicator, a pivoted filler pan bottom and the Möllers Rotronic®
weighing system.
pneumatic filling system are that blends to be filled do not
separate, the elimination of mechanical strain on the product,
low-dust filling due to low feed pressure, and the ease of
cleaning and maintaining the filling modules. In combination
with automatic bag placers, Möllers pneumatic rotary packers
can also be operated fully automatically.
For low and medium filling rates, the Möllers packer range
includes stand-alone and in-line pneumatic packers that have
proved effective in the special vibro pneumatic packer version
for filling difficult materials that are extremely prone to
bridging.
A flow of fluidizing air passing through a mesh aeration base
generates flowable two-phase mixture in the chamber, which
is driven into the bag in an even flow by the constant air
pressure level in the chamber. The advantages of the Möllers
Eight-spout pneumatic
Roto-Packer with
automatic empty-bag
applicator and empty
bag cassette magazine
Four-spout vibro-pneumatic in-line packer with
automatic bag applicator. With its vibrating
pressure chamber this type of packer is also
designed for filling materials that are highly prone
to bridging
– 6–
Ultrasonic bag sealing
Bag sealing before bag discharging
The increasing demand for bag packs that can be handled
without dirt requires hermetic sealing of the bag valves. The
bag sealing system developed for this by Möllers seals the
valves by ultrasound , to ensure clean handling along the
supply chain. Each filling module is fitted with its own
sealing unit. The sealing process comes immediately after the
filling process and before the bag is discharged. The cleanly
filled valve bag is removed from the filling spout, the valve is
gripped by the sealing device and ultrasonically sealed. The
bag is then transferred to the discharge conveyor.
Ultrasonic valve bag sealers make bag valves dust tight
Sealing units for rotary and in-line packers
All paper bags with film liner or with sealable internal coating
are suitable for ultrasonic sealing, apart from plastic bags. The
Möllers ultrasonic valve sealing devices are available for
impeller and pneumatic packers, of rotary and in-line
configuration. The practically dust-free filling operation
generates much less meal spillage, with less contamination of
nearby plant. For different filling weights from 10 to 50 kg, the
bag rests can be infinitely adjusted to the allocated bag lengths
manually and automatically.
Ultrasonic valve sealer on a single
spout packer
– 7–
Impeller in-line packers
Valve bag filling machines in in-line formation are
made up with one to four filling spouts from the
same filling modules as impeller Roto-Packers. The
machines can be operated with manual bag feed
and fully automatically with specially developed
bag applicators. Their compact format provides
great planning flexibility, with modest
requirements in terms of building structure.
1
2
5
3
4
Four-spout in-line packer in accordance with the Möllers module system
1
2
3
4
Dedusting system
Aeration cushion
Impeller filling module
Bag holder with vertical
discharge
5 Weighing electronics
Output of Möllers in-line bagging machines with one to four spouts,
bags per hour
– 8–
Automatic valve bag applicators
Cassette magazines allow rapid
changes between different
types of bag
The mode of operation of the Möllers valve bag applicators for
rotating filling machines has been matched to the high bag
filling rate of the Roto-Packer. Designed for a throughput of up
to 4,500 bags per hour, it combines a high work rate with great
precision – which is essential for intact application of the bags
to the filling spouts passing in rapid succession in front of the
bag applicator. The bag applicator can be fed with empty bags
from various types of bag magazine. Cassette magazines and
bundle magazines have special advantages, especially when
changing bag type frequently, and can be used as well as reel
magazines, which provide the highest degree of filling plant
automation. Filling magazines of this type with depalletizing
robots likewise largely eliminate the manpower required to
operate the filling plant.
High speed and reliability of application are features of the Möllers rotary
packer bag applicators
Bag with fitted valve ready for
application to the filling spout
Reel bag magazines configured as double magazines provide outstandingly fast changeover times
– 9–
Exemplary packaging plants from a single source
A
D
B
C
F
E
Complete packaging systems
Filled materials still have to be packed. An industrial packing
process requires additional downstream operations to load and
handle products efficiently and bring them to market quickly.
Palletizing, pallet stretch and shrink wrapping and palletless
stretch / shrink packaging using the extremely cost-effective
Möllers reverse hood system are essential elements for
efficient freight movement worldwide. Packaging plant for this
comprehensive process capable of satisfying industrial
demands in terms of integrability, functionality and availability
must be planned and built thoughtfully, with a thorough
Bag loading machines and equipment for loading
trucks, railway wagons and ships
Auto loaders for loading bagged goods directly onto
trucks
A
Silo filling and discharge equipment. Mechanical
and pneumatic conveyors
knowledge of the relevant product characteristics and the
operating conditions on site. As an engineering company with
more than five decades of experience in this specialist field,
Möllers gives an assurance of robust packaging and loading
systems ideally adapted to the particular production
environment, and perform their function reliably at the lowest
possible cost: Complete packaging solutions from a single
source.
B
Palletizing equipment for bags and other containers.
Stretch and shrink wrapping equipment for pallets
D
E
– 10 –
Machines for filling all kinds of bags and bulk
packaging units
C
Palletless shrink packaging equipment using the
Möllers reverse hood shrink system
F
The Producat® process control system
For highly automated palletizing and packaging plant to
function smoothly, it must have an impeccable central control
and monitoring system to reliably support the supervision
functions with minimal manpower. The Producat® computerbased control and visual display program developed for this
purpose by Möllers provides all the dialogue tools essential for
operation, housed in a central terminal:
Producat® records the machine data at control level and prepares it for the data
management level
1. Quick overview of the process structure and insight
into the sequence of operations.
2. Simple, intuitive operation and easy, error-minimized
input of order data.
3. Diagnostic routines immediately and directly available
if there is a fault, with optional link to the Möllers
Producat® remote service. Records all system data and
prepares it for data management.
Graphic displays and table views make it easier to understand
the system functions and input requirements. Producat® is
ready for linking to higher-level systems (host computer) and
to subsequent plant extensions. Producat®’s Internet
capability enables other computers on the company’s intranet to be used for order processing and system diagnosis. For
the man-machine dialogue Producat® provides the modules
A) Order processing, B) Plant diagnosis and C) Program
maintenance. A is the standard module for inputting and
handling production orders. Module B monitors the state of
the plant and is used for locating and rectifying faults.
Module C is used by IT staff to make basic adjustments to the
system and for online updating of the system software using
the Möllers remote service.
Order Processing module: Complete product data records are accessed by
clicking, then all the necessary machine settings proceed automatically
In the graphic overviews of the Plant diagnosis module the sensors and actuators
are displayed as coloured signals that facilitate location of faults by changing
their colours or flashing
– 11 –
Machines · Plants · Systems
Planning, development and manufacture of complete plants
Everything from a single source
Filling plants for
bulk, liquid and
pasty products
Filling
Shrink film
packaging plants
Shrinkwrappping
Palletizing plants
Palletizing
Palletizing and
depalletizing robots
Palletless
shrink/stretch
packaging plants
Palletless
packaging
Conveyor
and loading systems
Conveying
Bag loading
machines
Stretch film
packaging plants
Stretchwrapping
Loading
Bag loading systems
Loading
Fully automatic
truck loading
systems
Control
and visualization
systems
Monitoring
Control
Manufacturing plants of the Möllers Group:
Subsidiaries of the Möllers Group:
Mollers North America Inc.
5215 – 52nd St. S.E., Grand Rapids, Michigan 49512 / USA
Telephone +1 (616) 9 42-65 04, Fax +1 616 9 42-88 25
mollersna@mollersna.com, www.mollersna.com
000 „Möllers INTERTEC“, ul. Giljarowskogo, d 39, office 301-304
Moscow, Russia
Telephone/Fax +7 495 780 97 50
moellers-intertec@umail.ru
GREIF-VELOX Maschinenfabrik GmbH / Logdos
P.O. Box 12 11 51, 23532 Lübeck / Germany
Kronsforder Landstraße 177, 23560 Lübeck / Germany
Telephone +49 (0) 451 53 03-0, Fax +49 (0) 451 53 03-233
webmaster@greif-velox.de, www.greif-velox.de
Möllers Singapore, Singapore Representative Office, # 10 – 09 Golden Mile Tower
6001, Beach Road, Singapore 199 589 / Singapore
Telephone +65 6 298 9860/9817 6880, Fax +65 6 298 9289
moellers@singnet.com.sg
Logdos Liquid Filling
P.O. Box 12 11 51, 23532 Lübeck / Germany
Kronsforder Landstraße 177, D-23560 Lübeck
Telephone +49 (0) 451 53 03-0, Fax +49 (0) 451 53 03-233
logdos@logdos.de, www.logdos.de
Möllers France, 14, rue de la Papeterie
67310 Wasselonne / France
Telephone/Fax +33 3 88 87 29 00, Mobil 33 632 98 2452
moellers-france@orange.fr
Librawerk Maschinenfabrik GmbH
Vossenkamp 1, 38104 Braunschweig / Germany
Telephone +49 (0) 531 370 98-0, Fax +49 (0) 531 370 98-88
info@librawerk.de, www.librawerk.de
NATRONAG Maschinenfabrik GmbH
Vossenkamp 1, 38104 Braunschweig / Germany
Telephone +49 (0) 531 370 98-0, Fax +49 (0) 531 370 98-88
info@natronag.de, www.natronag.de
Möllers (UK) Ltd., Maxron House, Green Lane, Romiley, Stockport
Cheshire SK6 3JQ / Great Britain
Telephone +44 161 406 9824, Fax +44 161 494 5982, info@moellers.co.uk
Möllers Prague, Nad Rokoskou 14,18200 Praha 8 / Czech Republic
Telephone +420 2 8468 2462, Fax +420 2 8468 0499, bartosm@czn.cz
Möllers Brazil, Via Anhanguera km 14,5 - Vila Mangalot,
05000 São Paulo / Brazil
10.2008/1,5 E/Ry/Stu
Maschinenfabrik Möllers GmbH · 59269 Beckum/Germany · Sudhoferweg 93-97 • 59247 Beckum/Germany · Postfach 1764
Telephone +49 (0)2521 88-0 · Fax +49 (0)2521 88-100 · info@moellers.de · www.moellers.com